Method and apparatus for sending rank indication information, receiving method and apparatus thereof
The present invention discloses a method and an apparatus for sending rank indication (RI) information, and a method and an apparatus for receiving RI information, wherein the method for sending the RI information includes: carrying the RI information on a physical uplink control channel (PUCCH) for transmitting scheduling request (SR) information when the RI information and the SR information are sent within a same subframe, and sending the RI information and the SR information by using the PUCCH for transmitting SR information. According to the present invention, the problem that the orthogonality of codes between PUCCHs is destroyed due to that the RI information and the SR information are sent within a same subframe is solved, the overall system performance thereby can be guaranteed.
1. A method for sending rank indication information, including:
when rank indication information and scheduling request information are sent within a same subframe, carrying the rank indication information on a physical uplink control channel Format 1 , and sending the rank indication information and the scheduling request information by using the PUCCH Format 1 ;
wherein the process of sending the rank indication information and the scheduling request information by using the PUCCH Format 1 specially includes:
modulating the rank indication information to acquire a modulation symbol;
multiplying the modulation symbol by every data sequence on the PUCCH Format 1 ; and
mapping the multiplied sequence onto a target carrier and sending the multiplied sequence;
wherein if the rank indication information is 1 bit, then Binary Phase Shift Keying modulation is performed on the rank indication information; and if the rank indication is 2 bit, then Quadrature Phase Shift Keying modulation is performed on the rank indication information.